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sellersrodshop
what is the best way to fix this crazing on a vintage fiberglass ducati fuel tank without it coming back? i try to avoid glass like the plague & stick with metal, but get stuck with a few pieces from time to time 
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Senile Old Fart
Maybe use them to make molds from and pull some new parts?
metalman
Oldtimer
Not an expert on fiberglass, composites, resins, etc. But I would suggest if you do decide to recreate new tanks research or consult with reputable suppliers as to what resin would be best. I have heard limited information that the ethanol in today's gas could damage or dissolve certain polyester resins. Note that not all epoxy resins are suitable either.
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flynams
What you have there, as you know, is commonly called stress cracks...you can fix them many ways but they will come back if you don't remove what is causing the stress...I'm guessing that won't be possible by the looks of it...
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Paul
flynams is correct. those areas remind me of the bumpber holes on corvettes where they sandwich the glass body between the bumper and the brackets that connect to the frame. to repair the tank you will have to grind out the cracks all the way and build it back out with glass and resin. maybe you could use softer rubber bushings when bolting it back one?
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Paul
Hey Shine, please let me know if i'm telling him wrong. there may be a better way out there that i don't know. and if so, i would love to learn!
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Bob Hollinshead
Reminds me of all the snowmobile cowls from years ago, the gelcoat had to be ground off and into the glass then built back up. but even after the repair was done if it wasn't stronger and the stress and vibrations were still there it would crack again.
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sellersrodshop
shine;25489 said:
will try to give you a call in the afternoon. steph has been in the hospital having more surgery (#6 in 18 months...) so will try to get her home first...